Cytokeratin 20 Antibody (IHC)

CK20 is positively expressed in gastrointestinal adenocarcinoma, cholangiocarcinoma, pancreatic cancer, ovarian mucinous adenocarcinoma, transitional cell carcinoma and Merkel cell carcinoma, while in squamous cell carcinoma, breast cancer, renal cancer, lung adenocarcinoma, endometrium Negative expression was found in carcinoma, ovarian nonmucinous tumors, and small cell lung cancer. CK20 is often used in combination with CK7 and Villin to determine the tissue source of primary adenocarcinoma.